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Silicon based life, has anybody tried this? (5)


3 Name: Anonymous Scientist : 2012-07-14 17:03 ID:0cHiNp+q

In decades past there was considerable theoretical interest in the idea of silicon-based life, but it turns out that silicon does not behave quite exactly like carbon. Silicon-silicon bonds are not as strong as carbon-carbon bonds, so the sort of enormous and complex carbon-based molecules required by life as we know it (proteins, etc.) are unstable when silicon is substituted for carbon.

See also,

http://nai.arc.nasa.gov/astrobio/feat_questions/silicon_life.cfm
http://en.wikipedia.org/wiki/Hypothetical_types_of_biochemistry#Silicon_biochemistry

This is not to say that life evolving in an environment where soluble silicate and silane compounds were common could not have carbon-based biochemistry with bits of silicon-based compounds here and there that might have unusual and useful properties, but that is just speculation.